root › cellular organisms › Eukaryota › Opisthokonta › Metazoa › Eumetazoa › Bilateria › Deuterostomia › Chordata › Craniata › Vertebrata › Gnathostomata › Teleostomi › Euteleostomi › Actinopterygii › Actinopteri › Neopterygii › Teleostei › Osteoglossocephalai › Clupeocephala › Otomorpha › Ostariophysi › Otophysi › Characiphysae › Characiformes › Characoidei › Acestrorhamphidae › Acestrorhamphinae › Astyanax › Astyanax mexicanus